Im trying to use DRBD inside an OpenVz Virtual Node but I can't access
the kernel module from inside the node.

I tried to follow wiki howto (HA cluster with DRBD and Heartbeat) but
when I start drbd inside the node I get the next error:

stone101# /etc/init.d/drbd start
Starting DRBD resources: No response from the DRBD driver! Is the
module loaded?
[ d0 No response from the DRBD driver! Is the module loaded?
State change failed: (0)unknown error.